© 2017 Littelfuse Commercial Vehicle Products
Rev: 101217
littelfuse.com 1 of 2
Commercial Vehicle Product Datasheet
HWB18 SEALED POWER DISTRIBUTION MODULE
Compact Hard-Wired PDM for 280 Style Components
Specifications Overview
Max Fuse Rating: 30A per circuit
Max Continuous Current: 100A
Number of Cavities 18
Operating Temp: -40 °C to +105 °C
Ingress Protection: IP67/IP69K
Applications
• Accessory circuits
• Overflow circuits
• Main unit on small vehicles
Web Resources
Download 2D print and technical resources at:
littelfuse.com/hwb18
Description
The HWB18 Compact Hard-Wired Box features 18 cavities
that accept 2.8mm fuse and relay components and is the
perfect fit for accessory circuits and overflow circuits from
your main Power Distribution module. The HWB18 can hold
plug-in components including MINI fuses, MINI format circuit
breakers, 4-pin single throw relays, and 5-pin double throw
relays. The HWB18 features durable construction, an IP67/
IP69K rating, and a compact size. The user can customize
their own circuitry utilizing direct wire-to-component
connections which are crimped to the wire harness with
grommets to seal the bottom of the module.
Features and Benefits
• Cover latches keep the cover sealed and securely in place.
• Accepts any mini (280 style) circuit protection component.
• Compact size allows the unit to be installed in vehicles
with limited space.
• Ideal for accessory circuits, overflow circuits from main or
as a main module on smaller vehicles.
• IP67/IP69K sealed units can be installed virtually anywhere
on the vehicle and stands up to road splash and salt spray.
• TPAs (terminal position assurance locks) give secondary
locking protection of the wire leads, which help keeps
leads securely in place.
• Wires plug into the back of the unit using industry-
standard Delphi Metri-Pack Series 280 tanged terminals.
• Available with or without steel mounting bracket. Module
snaps into bracket, and is held at 30° angle or 90° angle
(bracket dependent) to allow easy viewing and servicing
• Tethers available to prevent loss of cover during service.
• Optional grid on inside cover available; functions as relay
retention insert
• HWB18, HWB12 & HWB6 share the same mounting
bracket so electrical system modification can be performed
without bracket or sheet metal alterations.
• A UL certification for this fuseholder means it can be used
as a component in material handling and electric-battery-
powered industrial truck applications with confidence that
it meets the requirements of UL 583 standards.
PART NUMBER DESCRIPTION
868-965 Base
873-032 Cover
901-106 Cover seal
873-680 Tether
883-084 TPA
901-320 Foam
868-964 90° angle mounting bracket
868-068 30° angle mounting bracket
Ordering Information
Accessories and Service Parts
PART NUMBER COVER TPA FOAM MOUNTING
BRACKET
BLACK CLEAR
PDM31001ZXM • • • 30°
PDM31002ZXM • • •
PDM31003ZXM • •
PDM31004ZXM • • • •
UR file number: AU6325
TPA: Terminal Position Assurance secondary locks for wire terminals
© 2017 Littelfuse Commercial Vehicle Products
Rev: 101217
littelfuse.com 2 of 2
Commercial Vehicle Product Datasheet
Specifications
Max Fuse Rating 30A per circuit
Max Continuous Current 100A at 23 °C, 70A at 85 °C
Number of Cavities 18
Recommended Mounting M6 bolt and lock washer
Mounting Bracket Torque 5.5-6.5 Nm
Temperature Range -40 °C to +105 °C
Ingress Protection Rating IP67/IP69K
Dimensions 80.4x69.8x45.2 mm
Wire Sizes 0.35-3.00 mm²
Mating Terminals & Seals Delphi Metri-Pack 280 Sealed female (tanged) See chart below for details. Sold separately.
Accessories Optional: Cover tether, mounting bracket, TPAs, 30° angle bracket, 90° angle bracket
Dimensions in millimeters
Sold separately. Available from Delphi.
HWB18 SEALED POWER DISTRIBUTION MODULE
Visit Littelfuse.com for the most up-to-date product information. Littelfuse reserves the right to make product changes, without notice.
Material in this document is as accurate as known at the time of publication.
Wire Size
Range (mm2)
Insulation
Diameter (mm) Terminal Cable Seal Cable Plug
0.50-0.35 mm² 1.84-2.51 mm 12084201 12089679 / 12041351
120103001.00-0.80 mm² 2.03-3.12 mm 12077411 12041351 / 12015323
3.00-2.00 mm² 2.45-3.80 mm 12129493 12015323 / 12015359
Mating Terminals and Seals Compatibility
